About Selecting Temperature Sensors
More
Hazardous Location Threaded Thermocouple
Probe Transmitters for Liquids and Gases


Safely measure the temperature of liquids and gases in places where flammable gases, vapors, dust, and fibers are present. The head of these transmitters is FM approved and CSA certified for use in hazardous areas. It’s also NEMA 4X and IP68 rated, so it stands up to wet and dusty environments and even brief submersion. These transmitters convert readings to analog signals and send them to devices such as remote displays and programmable logic controllers (PLCs).
To measure liquids, you’ll need to connect a thermowell or protective tube before immersing the probe in a tank or pipe. Otherwise, liquid will be sucked into the head through the fitting, which will damage the wiring. The probe can also be used to measure solids, such as molds and dies—it's made of stainless steel or nickel to shield against impacts. It also has a layer of magnesium oxide to protect the wiring inside the probe. For accurate readings, a spring inside the fitting pushes the probe tip forward, keeping it in constant contact with the surface you're measuring. The head has a removable cap for easy access to sensor connections.
These thermocouples are manufactured to conform to ASTM E230 for accuracy. Accuracy is how far off the reported value is from the actual temperature.
For technical drawings and 3-D models, click on a part number.
Probe | Probe Connection | Conduit Connection | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Dia. | Response Time, sec. | Temp. Range, °F | Accuracy | Overall Lg. | Sensor Type | Pipe Size | Thread Type | Gender | Pipe Size | Thread Type | Gender | Output Current Range | Voltage Range | Environmental Rating | Each | |
Type J | |||||||||||||||||
316 Stainless Steel Probe | |||||||||||||||||
2 1/2" | 1/4" | 5 | 0° to 500° | Not Rated below 32° F ±4° F between 32° to 500° F | 8 1/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 0000000 |
4" | 1/4" | 5 | 0° to 500° | Not Rated below 32° F ±4° F between 32° to 500° F | 9 5/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |
6" | 1/4" | 5 | 0° to 500° | Not Rated below 32° F ±4° F between 32° to 500° F | 11 5/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |
9" | 1/4" | 5 | 0° to 500° | Not Rated below 32° F ±4° F between 32° to 500° F | 14 5/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |
12" | 1/4" | 5 | 0° to 500° | Not Rated below 32° F ±4° F between 32° to 500° F | 17 5/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |
Type K | |||||||||||||||||
Nickel Probe | |||||||||||||||||
2 1/2" | 1/4" | 5 | 0° to 2150° | Not Rated below 32° F ±4° F between 32° to 533° F ±0.75% above 533° F | 8 1/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |
4" | 1/4" | 5 | 0° to 2150° | Not Rated below 32° F ±4° F between 32° to 533° F ±0.75% above 533° F | 9 5/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |
6" | 1/4" | 5 | 0° to 2150° | Not Rated below 32° F ±4° F between 32° to 533° F ±0.75% above 533° F | 11 5/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |
9" | 1/4" | 5 | 0° to 2150° | Not Rated below 32° F ±4° F between 32° to 533° F ±0.75% above 533° F | 14 5/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |
316 Stainless Steel Probe | |||||||||||||||||
12" | 1/4" | 5 | 0° to 2150° | Not Rated below 32° F ±4° F between 32° to 533° F ±0.75% above 533° F | 17 5/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |
Type T | |||||||||||||||||
316 Stainless Steel Probe | |||||||||||||||||
2 1/2" | 1/4" | 5 | -328° to 100° | Not Rated below 32° F ±1.8° F between 32° to 100° F | 8 1/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |
4" | 1/4" | 5 | -328° to 100° | Not Rated below 32° F ±1.8° F between 32° to 100° F | 9 5/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |
6" | 1/4" | 5 | -328° to 100° | Not Rated below 32° F ±1.8° F between 32° to 100° F | 11 5/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |
9" | 1/4" | 5 | -328° to 100° | Not Rated below 32° F ±1.8° F between 32° to 100° F | 14 5/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |
12" | 1/4" | 5 | -328° to 100° | Not Rated below 32° F ±1.8° F between 32° to 100° F | 17 5/8" | Ungrounded | 1/2 | NPT | Male | 3/4 | NPT | Female | 4mA-20mA | 8V DC-35V DC | IP68, NEC Class I Divisions 1, 2 Groups B, C, D, NEC Class II Divisions 1, 2 Groups E, F, G, NEC Class III Divisions 1, 2, NEMA 4X | 00000000 | 000000 |